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Fencer Vulns
low 3.7

CVE-2021-21416 json

Potential sensitive information disclosed in error reports

published 2021-04-01 5 y ago modified 2026-07-08 4 mo ago also GHSA-58c7-px5v-82hh , PYSEC-2021-11 , EUVD-2021-0057

cvss
3.7
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 35%
public exploits
0
none known

Summary

django-registration is a user registration package for Django. The django-registration package provides tools for implementing user-account registration flows in the Django web framework. In django-registration prior to 3.1.2, the base user-account registration view did not properly apply filters to sensitive data, with the result that sensitive data could be included in error reports rather than removed automatically by Django. Triggering this requires: A site is using django-registration < 3.1.2, The site has detailed error reports (such as Django's emailed error reports to site staff/developers) enabled and a server-side error (HTTP 5xx) occurs during an attempt by a user to register an account. Under these conditions, recipients of the detailed error report will see all submitted data from the account-registration attempt, which may include the user's proposed credentials (such as a password).

Patch / fix

  • pypi django-registration 3.1.2
  • django-registration_project django-registration 3.1.2
  • python-django-registration Debian 14, Debian 13, Debian 12 3.3-1

debian advisories DEBIAN-CVE-2021-21416

  • python-django-registration openSUSE Tumbleweed 5.2.1-1.3
  • python-django-registration openSUSE Tumbleweed 3.3-2.2
  • python-django-registration Package Hub 15 SP2 3.1.2-bp152.3.3.1
  • python-django-registration openSUSE Leap 15.2 3.1.2-lp152.3.3.1

opensuse advisories openSUSE-SU-2026:12007-1openSUSE-SU-2024:14138-1openSUSE-SU-2021:0597-1openSUSE-SU-2021:0588-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-21416 updated cvss 3.7

python-django-registration: potential sensitive information disclosed in error reports

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.41% chance of exploitation in the next 30 days, higher than 35% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 3.7 CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N
NVD 3.1 2.6 CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:C/C:L/I:N/A:N
NVD 2.0 3.5 AV:N/AC:M/Au:S/C:P/I:N/A:N
GitHub 3.1 3.7 CVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:L/I:L/A:N

Affected packages

ecosystem package affected fixed in
pypi django-registration
<3.1.2
3.1.2

Affected products

  • ubernostrum django-registration

Classification

Weakness
  • CWE-209 Generation of Error Message Containing Sensitive Information
  • CWE-201 Insertion of Sensitive Information Into Sent Data

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.